<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        video{
            width: 50%;
            height: 50%;
            margin: 50px auto;
            background-color: aquamarine;
            display: block;
        }
    </style>
</head>
<body>

<video id="video"></video>

<script>
    var video = document.getElementById('video');


    if (navigator.mediaDevices.getUserMedia) {
        //最新的标准API
        navigator.mediaDevices.getUserMedia({video : {width: 1000, height: 1000}}).then(success).catch(error);
    } else if (navigator.webkitGetUserMedia) {
        //webkit核心浏览器
        navigator.webkitGetUserMedia({video : {width: 1000, height: 1000}},success, error)
    } else if (navigator.mozGetUserMedia) {
        //firfox浏览器
        navigator.mozGetUserMedia({video : {width: 1000, height: 1000}}, success, error);
    } else if (navigator.getUserMedia) {
        //旧版API
        navigator.getUserMedia({video : {width: 1000, height: 1000}}, success, error);
    }

    function success(stream) {
        //兼容webkit核心浏览器
        // let CompatibleURL = window.URL || window.webkitURL;

        //将视频流设置为video元素的源
        console.log(stream);

        //video.src = CompatibleURL.createObjectURL(stream);
        video.srcObject = stream;
        video.play();
    }

    function error(error) {
        console.log(`访问用户媒体设备失败${error.name}, ${error.message}`);
    }

</script>
</body>
</html>
